/Engine/Source/Runtime/Core/Public/IO/IoDispatcher.h
[FIoRequest](API\Runtime\Core\IO\FIoRequest) ReadWithCallback ( const [FIoChunkId](API\Runtime\Core\IO\FIoChunkId) & ChunkId, const [FIoReadOptions](API\Runtime\Core\IO\FIoReadOptions) & Options, int32 Priority, FIoReadCallback && Callback )